/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
unsigned long _ovly_table_tmpl[8][4];
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config( void );
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#ifdef __GNUC__
/* With GCC, small printf (option LD Linker->Libraries->Small printf
   set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */

#include "core_cm4.h"

#define DEM_CR_TRCENA (1 << 24)
#define DWT_CR_CYCCNTENA (1 << 0)

// 使能DWT单元
void enable_dwt( void )
{
    CoreDebug->DEMCR |= DEM_CR_TRCENA;
    DWT->CYCCNT = 0;
    DWT->CTRL |= DWT_CR_CYCCNTENA;
}

// 获取CPU周期数
uint32_t get_cpu_cycles( void )
{
    return DWT->CYCCNT; // 返回当前CPU周期数
}
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main( void )
{

    /* USER CODE BEGIN 1 */

    /* USER CODE END 1 */

    /* MCU Configuration--------------------------------------------------------*/

    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    HAL_Init();

    /* USER CODE BEGIN Init */

    /* USER CODE END Init */

    /* Configure the system clock */
    SystemClock_Config();

    /* USER CODE BEGIN SysInit */

    /* USER CODE END SysInit */

    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    MX_USART1_UART_Init();
    /* USER CODE BEGIN 2 */
    enable_dwt();
    uint32_t _ovly_table_mem[8][4];
    uint32_t start_tick = get_cpu_cycles();
    memcpy( _ovly_table_tmpl, _ovly_table, sizeof( _ovly_table ) );
    uint32_t stop_tick = get_cpu_cycles();
    printf( "FLASH to MEMORY!start %d, end %d tick , offset %f us\n", start_tick, stop_tick, (stop_tick - start_tick)/(168.0) );
    start_tick = get_cpu_cycles();
    memcpy( _ovly_table_mem, _ovly_table_tmpl, sizeof( _ovly_table_tmpl ) );
    stop_tick = get_cpu_cycles();
    printf( "MEMORY to MEMORY stack !start %d, end %d tick , offset %f us\n", start_tick, stop_tick, (stop_tick - start_tick)/(168.0) );
    start_tick = get_cpu_cycles();
    memcpy( _ovly_table_mem, _ovly_table, sizeof( _ovly_table ) );
    stop_tick = get_cpu_cycles();
    printf( "FLASH to MEMORY stack!start %d, end %d tick , offset %f us\n", start_tick, stop_tick, (stop_tick - start_tick)/(168.0) );
    overlay ();
    /* USER CODE END 2 */

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while ( 1 )
    {
        /* USER CODE END WHILE */
        printf( "Hello World!\n" );
        HAL_Delay( 1000 );
        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config( void )
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    /** Configure the main internal regulator output voltage
    */
    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG( PWR_REGULATOR_VOLTAGE_SCALE1 );

    /** Initializes the RCC Oscillators according to the specified parameters
    * in the RCC_OscInitTypeDef structure.
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLM = 4;
    RCC_OscInitStruct.PLL.PLLN = 168;
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
    RCC_OscInitStruct.PLL.PLLQ = 4;
    if ( HAL_RCC_OscConfig( &RCC_OscInitStruct ) != HAL_OK )
    {
        Error_Handler();
    }

    /** Initializes the CPU, AHB and APB buses clocks
    */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                  | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

    if ( HAL_RCC_ClockConfig( &RCC_ClkInitStruct, FLASH_LATENCY_5 ) != HAL_OK )
    {
        Error_Handler();
    }
}

/* USER CODE BEGIN 4 */
PUTCHAR_PROTOTYPE
{
    while( ( USART1->SR & 0x40 ) == 0 );
    USART1->DR = ( uint8_t )ch;
    return ch;
}
/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler( void )
{
    /* USER CODE BEGIN Error_Handler_Debug */
    /* User can add his own implementation to report the HAL error return state */
    __disable_irq();
    while ( 1 )
    {
    }
    /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed( uint8_t *file, uint32_t line )
{
    /* USER CODE BEGIN 6 */
    /* User can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
